<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/html">
<head>
    <meta charset="utf-8">
    <title>登陆</title>
</head>
<body>
    <form action="sublogin" method="post">
        用户名：<input type="text" name="username"><br>
        密码：<input type="password" name="password"><br>
        <input type="submit" value="登陆">
    </form>
</body>
</html>